Talking-machine.



J, G. ENGLISH. TALKING MACHINE.

APPLICATION FILED JULY 7,1905.

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- To all wlwm it my A v UNITED STATES P TENrorrion JOHN c. motrsn, or CAMDEN, 'Nnw JERSEY.

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i Application filed July Specification of Letters Patent.

7, 1905. swarm. 268,615.

Patented Dec. 12, 1911.

Be it known that I, JOHN C. ENGLISH, a citizen of the United States, and a resident of the city of Camden, State of New Jersey, have invented certain new and-useful Improvements in Talking-Machines, of which the following is a full, clear, and complete disclosure.

My 1nvention relates to talking machines,-

and particularly to those parts of talking machines known as the sound reproducing and sound conveyin apparatus, and has for its object to provi e means for modifying the quantity of the sound reproduced by the talking machine.

In talking machines such as herein shown and described it is well known that the intensity of the vibration of the diaphragm of the reproducing apparatus is always sub stantially constant and variations thereof cannot be obtained by manipulation of the sound box, record, or record carrier.

My invention supplies means in connection with the sound conducting portions of the reproducing apparatus which will enable the quantity of the sound passing therethrough to be varied at the W111 of the operator.

Briefly my invention comprises the com-- bination-with a sound conducting tube of a talking machine, of means for reducing the am litude of the vibrations passing longitudlnally therethrough, by allowing free lateral communication between the interior and the exterior of the tube, whereby a part of the energy of the vibrations within the tube will escape and be absorbed by air surroundin the .tube, and consequently the amplitu e of the vibrations within the tube will be diminished, resulting in a diminished intensity of the sound issuing longitudinally from the tube.

In the accompanying drawing illustrating one form of my invention: Figure 1 is a side elevation of the main parts of the usual parts of the usualtalking machine showing my invention applied thereto. Fig. 2 is a lon itudinal sectional view of the sound con ucting mechanism employed in this form of my invention on a somewhat enview taken substantially upon the line 3-3, of Fig. 2; and Figs. 4 and 5 are detail views of the parts of m invention detached from the other parts 0 the talking machine and but when it is desired to reduce the showing the parts in two different positions relatively.

Referring to the drawing, the numeral 1 indicates any suitable form of casing for the talking machine motor above WhlCll is rotatably mounted a turntable 2 carrying 1 the record 3. Attached to one side of the casing 1 is an arm or bracket 4 which carties at its upper end a curved tube or elbow ''5. This tube or elbow 5 is adapted to be connected at its lower end 6 with any well 'known or suitableform of sound conducting tube and reproducing mechanism. The upper end of the elbow 5 is slightly reduced in diameter as indicated at 7 and provided with a bead or shoulder 8. Upon the reduced portion 7 and telescoping therewithis mounted a short section of tubin 9, the upper end of which is adapted to tefescope with the smaller end of the amplifying horn or support 10 therefor or other continuation of the sound conduct-ing means. The wall of the tubular section 9 is provided with one or more open ings as indicated at 11, which are preferably; elongated and slightly inclined. The elonation of the holes 11 gives a large opening in the tubular section 9 Without unnecessarily weakening the. same and the incline of the same permits of great variations in the volume of sound transmitted longitudinally out through the amplifying horn 10.

About the tubular section 9 is placed a sleeve or short section of tubing 12 which has an opening or openings 13 therein corresponding to the opening or openings 11 in the short section of tubin 9, but arranged longitudinally of the s eeve instead of in the inclined direction. The said sleeve 12is preferably located u on the tubular section'9 by means of a s oulder or head 14 and by the lower end of the telescoping portion of the support 10 for the amplifying horn as indicated at 15, and is provided with a projection 16 forming a andle for rotating the same about the tube 9. p

In the operation of the talking machine, when it is desired to obtain the full value of the sound produced by the reproducing mechanism the sleeve 12 is placed in such a position about the tubular ortion 9 that the openings 11 are closed y said sleeve, sound, the sleeve is rotated so that the openings 13 Corrections in Letters Patent No. 1,011,419.

register to a greater or less extent with the openings 11, thereby allowing the colunm of air within the sound conducting tube to vibrate freely transversely to a greater or less extent. This, of course, reduces the transmitted longitudinal vibration of the column of air within the tube and softens the sound emerging from the amplifying horn. This result is effected, as will be observed, without in any waymuliling or rendering indistinct the tones and sounds given off by the reproducing mechanism, the modification thereof being simply one which reduces the volume of the sound without any detrimental effect.

I preferably employ two opposite openings in the sound conducting tube and its corresponding sleeve, but I do not wish to be limited to this precise arrangement for other arrangements may be adopted which will produce the same effect and allow a more or less free transverse vibration of the column of air without interfering with the progress of the Waves longitudinally of said column.

It is obvious that my invention may be embodied in talking machines using either records having a vertically undulating groove or records having laterally undulat mg grooves of even depth.

What I claim is 1. In a talking machine, the combination with a sound conveying tube having a reduced end, of a sleeve rotatably mounted on said end, and means telescoping over the said end to hold said sleeve in position longitudinally, said tube and said sleeve being [snan] of said second tube, and means telescoping over the end of said second tube for holding said sleeve in place, said sleeve and said second tube being perforated to permit a part of the sound carried by said tube to pass through said sleeve.

3. In a talking machine, the combination with a sound conveying tube, having a reduced upper end forming an annular shoulder, of a second tube telescoping over said reduced end and resting upon said shoulder, and having an upper reduced end forming an annular shoulder, an amplifying horn telescoping over the upper end of said second tube and a sleeve rotatably carried by said second tube and confined between the shoulder and the lower end of said amplif in horn,'said sleeve and said second tu being perforated to permit a part of the, sound, carried by said tube, to pass through said sleeve to modify the intensity of sound issuing from said amplifying horn.

In witness whereof I have hereunto set my hand this sixth day of July, A. D., 1905. JOHN C. ENGLISH.

IVitnesses HENRY COBB KENNEDY, ALEXANDER PARK.

It is hereby certified that in Letters Patent- No. 1,011,419, granted December 12,

1911, upon the application of John 0. English, of Camden, New Jersey, for an improvement in Talking-Machines, errors appear in the printed specification requiring correction as follows: Page 1, line 104, for the word value read colume, and page 2, name of the first-mentioned witnessto the signature of the specification, for Henry Cobb Kennedy read Harry Cobb Ifennedy; and that the said Letters Patent should be read with these corrections therein that the same may conform to the record of the case in the Patent Oflice.

Signed and sealed this 30th day of January, A. D., 1912.

C. C. BILLINGS, Acting Commissioner of Patents. 

